Superheroes Iron Man (Robert Downey Jr.), Captain America (Chris Evans), Hulk (Mark Ruffalo), Thor (Chris Hemsworth) and Hawkeye (Jeremy Renner) must band together to protect the earth from an unexpected enemy in this 2012 action/sci-fi flick. Based on the Marvel Comics team of the same name. Samuel L. Jackson, Tom Hiddleston and Scarlett Johansson also star.